1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.kernel.util;
24  
25  import java.util.Comparator;
26  
27  /**
28   * <a href="ObjectValuePairComparator.java.html"><b><i>View Source</i></b></a>
29   *
30   * @author Brian Wing Shun Chan
31   */
32  public class ObjectValuePairComparator<K, V>
33      implements Comparator<ObjectValuePair<K, V>> {
34  
35      public ObjectValuePairComparator() {
36          this(true);
37      }
38  
39      public ObjectValuePairComparator(boolean asc) {
40          this(true, asc);
41      }
42  
43      public ObjectValuePairComparator(boolean byKey, boolean asc) {
44          _byKey = byKey;
45          _asc = asc;
46      }
47  
48      public int compare(ObjectValuePair<K, V> ovp1, ObjectValuePair<K, V> ovp2) {
49          if (_byKey) {
50              Comparable key1 = (Comparable)ovp1.getKey();
51              Comparable key2 = (Comparable)ovp2.getKey();
52  
53              if (_asc) {
54                  return key1.compareTo(key2);
55              }
56              else {
57                  return -(key1.compareTo(key2));
58              }
59          }
60          else {
61              Comparable value1 = (Comparable)ovp1.getValue();
62              Comparable value2 = (Comparable)ovp2.getValue();
63  
64              if (_asc) {
65                  return value1.compareTo(value2);
66              }
67              else {
68                  return -(value1.compareTo(value2));
69              }
70          }
71      }
72  
73      private boolean _byKey;
74      private boolean _asc;
75  
76  }